# uncompyle6 version 3.2.3
# Python bytecode 3.6 (3379)
# Decompiled from: Python 3.6.8 |Anaconda custom (64-bit)| (default, Feb 21 2019, 18:30:04) [MSC v.1916 64 bit (AMD64)]
# Embedded file name: site-packages\sqlalchemy\processors.py
"""defines generic type conversion functions, as used in bind and result
processors.

They all share one common characteristic: None is passed through unchanged.

"""
import codecs, re, datetime
from . import util


def str_to_datetime_processor_factory(regexp, type_):
    rmatch = regexp.match
    has_named_groups = bool(regexp.groupindex)

    def process(value):
        if value is None:
            return
            try:
                m = rmatch(value)
            except TypeError:
                raise ValueError(
                    "Couldn't parse %s string '%r' - value is not a string."
                    % (type_.__name__, value)
                )

            if m is None:
                raise ValueError(
                    "Couldn't parse %s string: '%s'" % (type_.__name__, value)
                )
            if has_named_groups:
                groups = m.groupdict(0)
                return type_(
                    **dict(
                        list(
                            zip(
                                iter(groups.keys()),
                                list(map(int, iter(groups.values()))),
                            )
                        )
                    )
                )
            return type_(*list(map(int, m.groups(0))))

    return process


def py_fallback():
    def to_unicode_processor_factory(encoding, errors=None):
        decoder = codecs.getdecoder(encoding)

        def process(value):
            if value is None:
                return
            else:
                return decoder(value, errors)[0]

        return process

    def to_conditional_unicode_processor_factory(encoding, errors=None):
        decoder = codecs.getdecoder(encoding)

        def process(value):
            if value is None:
                return
            elif isinstance(value, util.text_type):
                return value
            else:
                return decoder(value, errors)[0]

        return process

    def to_decimal_processor_factory(target_class, scale):
        fstring = "%%.%df" % scale

        def process(value):
            if value is None:
                return
            else:
                return target_class(fstring % value)

        return process

    def to_float(value):
        if value is None:
            return
        else:
            return float(value)

    def to_str(value):
        if value is None:
            return
        else:
            return str(value)

    def int_to_boolean(value):
        if value is None:
            return
        else:
            return bool(value)

    DATETIME_RE = re.compile("(\\d+)-(\\d+)-(\\d+) (\\d+):(\\d+):(\\d+)(?:\\.(\\d+))?")
    TIME_RE = re.compile("(\\d+):(\\d+):(\\d+)(?:\\.(\\d+))?")
    DATE_RE = re.compile("(\\d+)-(\\d+)-(\\d+)")
    str_to_datetime = str_to_datetime_processor_factory(DATETIME_RE, datetime.datetime)
    str_to_time = str_to_datetime_processor_factory(TIME_RE, datetime.time)
    str_to_date = str_to_datetime_processor_factory(DATE_RE, datetime.date)
    return locals()


try:
    from sqlalchemy.cprocessors import (
        UnicodeResultProcessor,
        DecimalResultProcessor,
        to_float,
        to_str,
        int_to_boolean,
        str_to_datetime,
        str_to_time,
        str_to_date,
    )

    def to_unicode_processor_factory(encoding, errors=None):
        if errors is not None:
            return UnicodeResultProcessor(encoding, errors).process
        else:
            return UnicodeResultProcessor(encoding).process

    def to_conditional_unicode_processor_factory(encoding, errors=None):
        if errors is not None:
            return UnicodeResultProcessor(encoding, errors).conditional_process
        else:
            return UnicodeResultProcessor(encoding).conditional_process

    def to_decimal_processor_factory(target_class, scale):
        return DecimalResultProcessor(target_class, "%%.%df" % scale).process


except ImportError:
    globals().update(py_fallback())
